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Effects of Health Record Computerization in the Context of the COVID-19 Pandemic in Burundi’ Hospitals: Propensity Score Matching 认领 引用
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作者 Florence Munezero Charles J. Sossa +1 位作者 Glele Yolaine Ahanhanzo Leodegal Bazira 《Open Journal of Epidemiology》 2022年第3期245-260,共16页
Introduction: A great number of software are currently used to digitalize the patient records in order to optimize the quality of services offered to patients. The objective of this study was to evaluate the effects o... Introduction: A great number of software are currently used to digitalize the patient records in order to optimize the quality of services offered to patients. The objective of this study was to evaluate the effects of Electronic Health Records use in Burundi’s hospitals, taking into account the COVID-19 pandemic context. Methods: This was a quasi-experimental study based on difference in difference method. Ten district hospitals were included in the study, five of them had the Electronic Health Records and five of which did not yet have the Electronic Health Records. The hospital’s control group were chosen using the propensity score matching method. The period before the project’s implementation was 2014 and the period after were 2019 and 2020. Results: After 5 years of the Electronic Health Record’s implementation, the results showed an increase in outpatient consultation (70%), deliveries (more than 100%), caesarean sections (56%) and major surgeries (43%) indicators. The overall quality score of hospitals’ care had a regressive effect of 37% and the income from performance-based funding had an increase by 31%. The indicators which were affected by the context of the COVID-19 pandemic were especially outpatient consultation, caesarian section, income from performance-based funding decreased by 3%, 5% and 20% respectively. Conclusion: The effects of Electronic Health Records use are effective. As the COVID-19 pandemic impacted the hospital’s indicators negatively, the resilient strategies alongside the potential shocks are recommended. 展开更多
关键词 Effects Health Record Computerization COVID-19 Hospitals Propensity Score Matching
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Research on the Development of Enterprise Financial Accounting from Computerization to Informatization 认领 引用
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作者 FENGShuying 《外文科技期刊数据库（文摘版）经济管理》 2022年第1期157-160,共4页
Accounting informatization is the combination of accounting and information technology. It is a necessary measure for enterprise financial accounting management to conform to the wave of informatization. It is helpful... Accounting informatization is the combination of accounting and information technology. It is a necessary measure for enterprise financial accounting management to conform to the wave of informatization. It is helpful to enhance the competitiveness of enterprises and solve the "isolated island" phenomenon existing in accounting computerization. In view of this, the article first points out the necessity of the development of enterprise financial accounting informatization, and then expounds the main performance in the development process of enterprise financial accounting informatization, which is helpful for practitioners to understand the realization conditions of enterprise financial accounting informatization. On this basis, the article puts forward the effective countermeasures for the development of enterprise financial accounting computerization to informatization, including establishing the correct cognition and concept of enterprise financial accounting informatization;In order to provide certain reference for the research and practice of practitioners, it is necessary to upgrade and perfect the enterprise financial accounting system in two aspects. 展开更多
关键词 corporate financial accounting computerization information technology development performance c
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Thoughts on Practical Teaching of Accounting Computerization 认领 引用
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作者 MA Jin 《外文科技期刊数据库（文摘版）教育科学》 2021年第3期081-083,共3页
At present, there are many problems in accounting computerization in colleges and universities, such as unreasonable class layout, lack of teachers and weak practical training, which can not adapt to social developmen... At present, there are many problems in accounting computerization in colleges and universities, such as unreasonable class layout, lack of teachers and weak practical training, which can not adapt to social development. Therefore, this paper has certain practical significance for solving the problems related to accounting computerization, training various accounting and electromechanical personnel to meet the social needs and promoting social development. 展开更多
关键词 accounting computerization training teaching
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Stress Redistribution Patterns in Road-Rail Double-Deck Bridges:Insights from Long-Term Bridge Health Monitoring 认领 引用 被引量：1
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作者 Benyu Wang Ke Chen Bingjian Wang 《Structural Durability & Health Monitoring》 EI 2026年第1期317-340,共24页
To examine stress redistribution phenomena in bridges subjected to varying operational conditions,this study conducts a comprehensive analysis of three years of monitoring data from a 153-m double-deck road–rail stee... To examine stress redistribution phenomena in bridges subjected to varying operational conditions,this study conducts a comprehensive analysis of three years of monitoring data from a 153-m double-deck road–rail steel arch bridge.An initial statistical comparison of sensor data distributions reveals clear temporal variations in stress redistribution patterns.XGBoost(eXtreme Gradient Boosting),a gradient-boosting machine learning(ML)algorithm,was employed not only for predictive modeling but also to uncover the underlying mechanisms of stress evolution.Unlike traditional numerical models that rely on extensive assumptions and idealizations,XGBoost effectively captures nonlinear and time-varying relationships between stress states and operational/environmental factors,such as temperature,traffic load,and structural geometry.This approach allows for the identification of critical periods and conditions under which stress redistribution becomes significant.Results indicate a clear shift of stress concentrations frombeamends toward mid-span regions following the commencement of metro operations,reflecting both structural adaptation and localized overstress near arch ribs.Furthermore,the model generates robust predictions of stress evolution,demonstrating potential applications in early warning systems and fatigue risk assessment.This work represents the first application of interpretable gradient-boosting techniques to stress redistribution modeling in double-deck bridges.In addition,a Stress Redistribution Index(SRI)is proposed,derived from this monitoring study and finite-element-based transverse load distributions,to quantify temporal stress shifts between midspan and edge beams.The results provide both theoretical contributions and practical guidance for the design,inspection,and maintenance of complex bridge structures. 展开更多
关键词 Bridge health monitoring computerized monitoring machine learning stress sensors
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2D Plain and 3D Needle-punched C/SiC Composites:Low-velocity Impact Damage Behavior and Failure Mechanism 认领 引用 被引量：1
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作者 LUAN Xingang HE Dianwei +1 位作者 TU Jianyong CHENG Laifei 《无机材料学报》 SCIE EI CAS CSCD 北大核心 2025年第2期205-214,I0004,共10页
Continuous carbon fiber reinforced silicon carbide(C/SiC)composites are often subjected to low-velocity impacts when utilized as structural materials for thermal protection.However,research on in-plane impact damage a... Continuous carbon fiber reinforced silicon carbide(C/SiC)composites are often subjected to low-velocity impacts when utilized as structural materials for thermal protection.However,research on in-plane impact damage and multiple impact damage of C/SiC composites is limited.To investigate the in-plane impact damage behavior of C/SiC composites,a drop-weight impact test method was developed for strip samples,and these results were subsequently compared with those of C/SiC composite plates.Results show that the in-plane impact behavior of C/SiC strip samples is similar to that of C/SiC composite plates.Variation of the impact load with displacement is characterized by three stages:a nearly linear stage,a severe load drop stage,and a rebound stage where displacement occurs after the impact energy exceeds its peak value.Impact damage behavior under single and multiple impacts on 2D plain and 3D needled C/SiC composites was investigated at different impact energies and durations.Crack propagation in C/SiC composites was studied by computerized tomography(CT)technique.In the 2D plain C/SiC composite,load propagation between layers is hindered during impact,leading to delamination and 90°fiber brittle fracture.The crack length perpendicular to the impact direction increases with impact energy increases,resulting in more serious 0°fiber fracture and a larger area of fiber loss.In the 3D needled C/SiC composite,load propagates between the layers during impact through the connection of needled fibers.The fibers continue to provide substantial structural support,with notable instances of fiber pull-off and debonding.Consequently,the impact resistance is superior to that of 2D plain C/SiC composite.When the 3D needled C/SiC composite undergoes two successive impacts of 1.5 J,the energy absorption efficiency of the second impact is significantly lower,accompanied by a smaller impact displacement.Moreover,the total energy absorption efficiency of these two impacts of 1.5 J is lower than that of a single 3.0 J impact. 展开更多
关键词 ceramic-matrix composite fracture low-velocity impact computerized tomography analysis
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Characterizing disintegrated dolomite pore structure and seepage:CT scanning and numerical approach 认领 引用 被引量：1
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作者 Jiaxing Dong Peixuan Dai +2 位作者 Wenlian Liu Hanhua Xu Sugang Sui 《Journal of Rock Mechanics and Geotechnical Engineering》 SCIE CSCD 2025年第7期4386-4399,共14页
Disintegrated dolomite slope and tunnel disasters occur frequently due to poor water stability of disintegrated dolomite,primarily in a form of seepage failure.For engineering purposes,it is critical to determine the ... Disintegrated dolomite slope and tunnel disasters occur frequently due to poor water stability of disintegrated dolomite,primarily in a form of seepage failure.For engineering purposes,it is critical to determine the seepage properties of disintegrated dolomite within the strata.However,conventional experimental methods are time-consuming and expensive and may not be effective in investigating seepage characteristics due to the heterogeneity of disintegrated dolomite.In this study,pore network model(PNM)was established by the computerized tomography(CT)scanning technology to characterize the pores.Meanwhile,the seepage and coefficient of permeability under different inlet stress conditions based on the accurate pore model were realized by linking the commercial image processing software Avizo with the commercial multi-physics modeling package Comsol.The results show that the porosities of severely and completely disintegrated dolomites are 29.17% and 45.37%,respectively.The grade of pore development increases with disintegration grade,which facilitates seepage failure.Severely and completely disintegrated dolomites have the coefficients of permeability of 9.67×10-7 m/s and 1.61×10-6 m/s,respectively.Under conventional conditions,severely and completely disintegrated dolomites undergo seepage failure above a pressure difference of 6×103 Pa and 5×103 Pa,respectively.These results are consistent with both in situ water pressure tests in the borehole and laboratory tests with the constant-head method,demonstrating that CT scanning is an effective method for observing fractures and pores in disintegrated dolomite for seepage evaluation. 展开更多
关键词 Disintegrated dolomite X-ray computerized tomography(CT) Pore network model(PNM) Seepage simulation
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Study on photoluminescence and thermoluminescence of Y2-xSmxMgTiO6phosphors 认领 引用 被引量：1
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作者 Hao Liu Lu-Yan Wang +1 位作者 Zheng-Ye Xiong Jing-Yuan Guo 《Nuclear Science and Techniques》 SCIE EI CAS CSCD 2025年第7期157-166,共10页
Double perovskite matrix materials have recently attracted considerable interest due to their structural flexibility,ease of doping,and excellent thermal stability.While photoluminescence(PL)studies of rare-earth-dope... Double perovskite matrix materials have recently attracted considerable interest due to their structural flexibility,ease of doping,and excellent thermal stability.While photoluminescence(PL)studies of rare-earth-doped double perovskites are common,research on their thermoluminescence(TL)properties is less extensive.This study synthesized a series of Y2-xSmxMgTiO6(0≤x≤0.1)samples using a high-temperature solid-state method.X-ray diffraction(XRD)analysis confirmed a monoclinic crystal structure(space group P21∕n),with Sm3+ions substituting for Y3+ions in Y2MgTiO6.The PL results indicated that the optimal doping concentration was Y1.95Sm0.05MgTiO6,exhibiting emission peaks at 568,605,652,and 715 nm under 409 nm blue light excitation.The TL measurements for different doping concentrations showed that the Y1.98Sm0.02MgTiO6phosphors exhibited the strongest TL signals.The TL peaks observed at 530 and 610 K correspond to defects in the matrix and Sm3+dopants,respectively.The Tm-Tstopanalysis revealed that the TL curve of Y1.98Sm0.02MgTiO6phosphors was a superposition of seven peaks.Computerized glow curve deconvolution(CGCD)was performed on the TL of the sample according to the results of three-dimensional thermoluminescence spectra(3D-TL)and Tm-Tstop,and the trap depths in the sample were estimated to range from 0.69 to 1.49 eV.Additionally,the lifetimes of each overlapping peak were calculated using the fitting parameters.Furthermore,the dose-response test showed that the saturation dose of the sample was high(9956 Gy).Therefore,this material can serve as a thermoluminescent dosimeter for high-dose measurements.The saturation dose for the lowest-temperature overlapping peak was 102 Gy,which correlated with its specific energy-level lifetime,whereas the other overlapping peaks also exhibited favorable linear relationships. 展开更多
关键词 Y2MgTiO6 Thermoluminescence Tm-Tstop Computerized glow curve deconvolution Dose-response
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Accurate quantification of the algebraic,multiplicative algebraic,and simultaneous iterative reconstruction techniques in ionosphere rebuilding based on the TIEGCM assessment 认领 引用 被引量：1
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作者 Ao Qi HaiBing Ruan 《Earth and Planetary Physics》 EI CSCD 2025年第1期117-126,共10页
The algebraic reconstruction technique(ART),multiplicative algebraic reconstruction technique(MART),and simultaneous iterative reconstruction technique(SIRT)are computational methodologies extensively utilized within ... The algebraic reconstruction technique(ART),multiplicative algebraic reconstruction technique(MART),and simultaneous iterative reconstruction technique(SIRT)are computational methodologies extensively utilized within the field of computerized ionospheric tomography(CIT)to facilitate three-dimensional reconstruction of the ionospheric morphology.However,reconstruction accuracy elicits recurrent disputes over its practical application,and people usually attribute this issue to incomplete and uneven coverage of the measurements.The Thermosphere Ionosphere Electrodynamics General Circulation Model(TIEGCM)offers a reasonable physics-based ionospheric background and is widely utilized in ionospheric research.We use the TIEGCM simulations as the targeted ionosphere because the current measurements are far from able to realistically reproduce the ionosphere in detail.Optimized designations of satellite measurements are conducted to investigate the limiting performance of CIT methods in ionospheric reconstruction.Similar to common practice,electron density distributions from outputs of the International Reference Ionosphere(IRI)model are used as the iterative initial value in CIT applications.The outcomes suggest that despite data coverage,iterative initial conditions also play an essential role in ionospheric reconstruction.In particular,in the longitudinal sectors where the iterative initial height of the F2-layer peak electron density(hmF2)differs substantially from the background densities,none of the three CIT methods can reproduce the exact background profile.When hmF2 is close but the ionospheric F2-layer peak density(NmF2)is different between the targeted background and initial conditions,the MART performs better than the ART and SIRT,as evidenced by the correlation coefficients of MART being above 0.97 and those of ART and SIRT being below 0.85.In summary,this investigation reveals the potential uncertainties in traditional CIT reconstruction,particularly when realistic hmF2 or NmF2 values differ substantially from the initial CIT conditions. 展开更多
关键词 computerized ionospheric tomography International Reference Ionosphere model Thermosphere Ionosphere Electrodynamics General Circulation model ionosphere
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Comparison of three diagnostic imaging modalities for use in diabetic inferior arterial lesions 认领 引用
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作者 Ying Bo Jia Xie +3 位作者 Fan Xu Guo Yang Dong-Ling Li Xiao-Hang Yan 《World Journal of Diabetes》 SCIE 2025年第7期217-226,共10页
BACKGROUND Underdiagnosis of peripheral arterial disease results in inadequate treatment and more serious consequences.Hence,clinicians have focused on early diagnosis and treatment.AIM To investigate the effectivenes... BACKGROUND Underdiagnosis of peripheral arterial disease results in inadequate treatment and more serious consequences.Hence,clinicians have focused on early diagnosis and treatment.AIM To investigate the effectiveness of the combination of doppler ultrasonography(DUS),three-dimensional dynamic contrast-enhanced magnetic resonance an-giography(CE-MRA),and CT angiography(CTA)in assessing lower extremity arterial disease in diabetes mellitus(DM).METHODS This study retrospectively analyzed the imaging and clinical data of 116 patients diagnosed with DM complicated with lower extremity vascular diseases from January 2021 to June 2023.All patients underwent unilateral or bilateral DUS,CTA,and CE-MRA as well as invasive digital subtraction angiography(DSA).The application values of DUS,CE-MRA,and CTA were compared.RESULTS A total of 152 lower extremity arteries in the 116 patients were graded following the classification of vascular branches.The Kappa values between DUS and DSA were 0.780,0.755,and 0.806 for diagnosing moderate stenosis and 0.484,0.699,and 0.449 for severe stenosis of grade 1 arteries,grade 2 arteries,and grade 3 arteries,respectively.The Kappa values between CE-MRA and DSA were 0.784,0.814,and 0.835 for diagnosing moderate stenosis and 0.694,0.748,and 0.606 for severe stenosis of grade 1 arteries,grade 2 arteries,and grade 3 arteries,respectively.The Kappa values between CTA and DSA were 0.900,0.858,and 0.878 for diagnosing moderate stenosis and 0.882,0.823,and 0.756 for severe stenosis of grade 1 arteries,grade 2 arteries,and grade 3 arteries,respectively.CONCLUSION DUS,CE-MRA,and CTA demonstrated comparable accuracy in diagnosing lower extremity arterial disease in DM,and the consistency between CTA and DSA diagnoses was higher than the other two imaging methods. 展开更多
关键词 Doppler ultrasonography Three-dimensional dynamic contrast-enhanced magnetic resonance angiography Computerized tomography angiography Diabetes Lower-extremity arterial disease
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Acceptability and impact of computerised cognitive training on mental health and cognitive skills in schizophrenia:a double-blind controlled trial 认领 引用 被引量：1
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作者 Elahe Fathi Azar Hooshang Mirzaie +1 位作者 Samaneh Hosseinzadeh Hojjat Allah Haghgoo 《General Psychiatry》 CAS CSCD 2025年第2期113-122,共10页
Background Schizophrenia is characterised by pervasive cognitive deficits that significantly impair daily functioning and quality of life.Pharmacological treatments have limited efficacy in addressing these deficits,h... Background Schizophrenia is characterised by pervasive cognitive deficits that significantly impair daily functioning and quality of life.Pharmacological treatments have limited efficacy in addressing these deficits,highlighting the need for adjunctive interventions like computerised cognitive training(CCT).Aims This study aimed to evaluate the effects of a 30-session CCT programme on mental well-being and cognitive performance in individuals with schizophrenia.Additionally,it assessed the usability and acceptability of CCT in this population.Methods A double-blind,randomised clinical trial was conducted with 54 participants assigned to intervention and control groups.Cognitive and mental health outcomes were assessed using validated tools such as the Depression Anxiety Stress Scale 21,the Warwick-Edinburgh Mental Wellbeing Scale and the Cambridge Neuropsychological Test Automated Battery.Usability was measured with the System Usability Scale(SUS).Assessments were conducted at baseline,post-intervention and 3 months post-follow-up.Results The CCT intervention significantly improved mental well-being,reduced stress and enhanced working memory(paired associate learning,spatial working memory and spatial span)compared with controls.However,no significant effects were observed for anxiety,depression or executive function.Usability scores were high(SUS=83.51),and compliance rates were strong(92.7%),indicating favourable participant engagement.Conclusion CCT demonstrated potential as an adjunctive treatment for schizophrenia,with significant improvements in targeted cognitive and mental health domains.The high usability and compliance rates support its feasibility for broader implementation.Further research is needed to optimise protocols and explore long-term benefits.CCT offers a promising approach to addressing mental health and cognitive challenges in schizophrenia,particularly for stress and working memory.Its usability and acceptability suggest it could be seamlessly integrated into clinical practice. 展开更多
关键词 cognitive deficits usability computerised cognitive training cct aims schizophrenia cognitive performance acceptability computerized cognitive training mental well being
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Influence of drying-wetting cycles and soaking conditions on the shear creep characteristics of sandstone joints 认领 引用
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作者 GAO Yingchao WU Qiang +4 位作者 WEI Wei JIANG Qinghui JIANG Shu ZHANG Chunshun DONG Jie 《Journal of Mountain Science》 SCIE CSCD 2025年第4期1462-1481,共20页
Numerous slope failures have been reported during periods of water level fluctuations.Understanding the influence of water on the creep behavior of joints is essential for evaluating the long-term stability of slopes.... Numerous slope failures have been reported during periods of water level fluctuations.Understanding the influence of water on the creep behavior of joints is essential for evaluating the long-term stability of slopes.This study focuses on the effects of drying-wetting cycles and soaking conditions on the long-term behavior of sandstone joints.A total of 12 multi-stage shear creep tests are carried out on sandstone joints subjected to varying drying-wetting cycles under both soaking and un-soaking conditions.Based on the experimental results,the influences of drying-wetting cycles as well as soaking conditions on the microstructure,shear creep displacement,strength,and failure morphologies of sandstone joints are investigated comprehensively.Results indicate that increasing drying-wetting cycles not only yields larger shear creep displacements but also leads to a negative exponential decrease in the strength of sandstone joints.Besides,soaking conditions strongly influence the creep behavior of sandstone joints.The failure strength and long-term strength of sandstone joints for soaked samples decrease by 13.6%–29.0%and 19.4%–37.5%,respectively,as compared to unsoaked samples.Furthermore,four distinct stages in the shear creep process were identified according to the results obtained from multi-stage shear creep tests and computerized tomography scans,and three creep failure modes of sandstone joints are thus determined.Finally,the influence mechanism of drying-wetting cycles and soaking conditions on the creep failure modes of sandstone joints is revealed.Drying-wetting cycles and soaking conditions diminish the influence of asperities on the shear creep behavior of joints,thereby reducing the resistance of joints to long-term deformation. 展开更多
关键词 Drying-wetting cycles Soaking conditions Shear creep Sandstone joints Computerized tomography
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《CT理论与应用研究(中英文)》约稿函 认领 引用
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《CT理论与应用研究（中英文）》 2025年第3期446-446,共1页
尊敬的先生/女士:CT(Computerized Tomography)——计算机断层成像,是一种在不破坏物体结构的前提下,根据物体周边所获取的某种物理量(如地震波、X射线灯)的投影数据,运用一定的数学方法,通过计算机处理,重建物体特定层面上的二维图像,... 尊敬的先生/女士:CT(Computerized Tomography)——计算机断层成像,是一种在不破坏物体结构的前提下,根据物体周边所获取的某种物理量(如地震波、X射线灯)的投影数据,运用一定的数学方法,通过计算机处理,重建物体特定层面上的二维图像,以及依据一系列上述二维图像构成三维图像的技术。 展开更多
关键词 数学方法 投影数据 Computerized Tomography CT
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Computerized cognitive behavioral therapy with sertraline in schizophrenia with depressive episodes: A 12-week randomized controlled trial 认领 引用
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作者 Ren-Chun Huang Nicha Wareesawetsuwan +1 位作者 Nan Lin Xiao-Dan Li 《World Journal of Psychiatry》 SCIE 2025年第11期357-366,共10页
BACKGROUND Schizophrenia is commonly associated with comorbid depression,which exacerbates cognitive impairments and negatively impacts quality of life.Despite the high prevalence and burden of these comorbidities,eff... BACKGROUND Schizophrenia is commonly associated with comorbid depression,which exacerbates cognitive impairments and negatively impacts quality of life.Despite the high prevalence and burden of these comorbidities,effective treatment options,particularly for cognitive dysfunction,remain limited.AIM To evaluate the efficacy of computerized cognitive behavioral therapy(CCBT)with sertraline vs sertraline monotherapy in improving depressive symptoms,cognitive function,and quality of life in schizophrenia and depressive episodes.METHODS In this single-center,randomized controlled trial,68 adults[mean age(SD)=36.5(10.0),57.4%male]with schizophrenia and depressive symptoms were randomly assigned to receive either CCBT with sertraline or sertraline monotherapy during a 4-week hospitalization.The CCBT intervention involved 45-60-minute sessions twice weekly for four weeks.Outcomes included comparisons of depressive symptoms(Calgary depression scale for schizophrenia),cognitive function[MATRICS consensus cognitive battery(MCCB)],and quality of life(36-item short form survey)between the groups.RESULTS The experimental group showed greater improvements in depressive symptoms at 4,8,and 12 weeks compared to the controls,with the most notable difference at 12 weeks[mean difference(MD)=-1.7;P<0.001;Cohen’s d=0.9].Cognitive function improved across all MCCB domains in the experimental group,with higher processing speed scores(MD=4.1;P=0.043;Cohen’s d=0.5)and social cognition scores(MD=4.9;P=0.006;Cohen’s d=0.7)than in the control group.Quality of life,particularly in mental health,was significantly better in the experimental group.CONCLUSION CCBT with sertraline was more effective than sertraline monotherapy for patients with schizophrenia and depressive episodes,supporting its use as an adjunctive therapy. 展开更多
关键词 Schizophrenia with depressive episode Computerized cognitive behavioral therapy Sertraline Cognitive function Quality of life Randomized controlled trial
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Applied Strain Field on Microstructure Optimization of Ti-Al-Nb Alloy Computer Simulated by Phase Field Approach 认领 引用 被引量：3
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作者 Wei GUO Yaping ZONG +1 位作者 Gang WANG Liang ZUO 《Journal of Materials Science & Technology》 SCIE EI CAS 2004年第3期245-248,共4页
The effects of applied tensile strain on the coherentα_2→O-phase transformation in Ti-Al-Nb alloys are explored bycomputer simulation using a phase-field method.The focus is on the influence of the applied strain di... The effects of applied tensile strain on the coherentα_2→O-phase transformation in Ti-Al-Nb alloys are explored bycomputer simulation using a phase-field method.The focus is on the influence of the applied strain direction onthe microstructure and volume fraction of the O-phase precipitates.It is found that altering applied strain directioncan modify microstructure of Ti-25Al-10~12Nb(at.pct)alloy duringα_2→O-phase transformation effectively andfull laminate microstructure in the Ti-25Al-10Nb(at.pct)alloy can be realized by an applied strain only along thedirection 30°away from theα_2 phasein magnitude equivalent to the stress-free transformation strain.Thesimulation also shows that not only the magnitude of applied strain but also the applied strain direction influencesthe O-phase volume fraction and the effect of strain direction on the volume fraction is up to 25%. 展开更多
关键词 Phase field simulation Strain induced phase transformation Ti-Al-Nb alloy Computerization materials Microstructure evoutionv Precipitates geometry Microstructure design
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3D reconstruction method and connectivity rules of fracture networks generated under different mining layouts 认领 引用 被引量：19
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作者 Zhang Ru Ai Ting +2 位作者 Li Hegui Zhang Zetian Liu Jianfeng 《International Journal of Mining Science and Technology》 EI CAS 2013年第6期863-871,共9页
In current research, a series of triaxial tests, which were employed to simulate three typical mining lay-outs (i.e., top-coal caving, non-pillar mining and protected coal seam mining), were conducted on coal by using... In current research, a series of triaxial tests, which were employed to simulate three typical mining lay-outs (i.e., top-coal caving, non-pillar mining and protected coal seam mining), were conducted on coal by using MTS815 Flex Test GT rock mechanics test system, and the fracture networks in the broken coal samples were qualitatively and quantitatively investigated by employing CT scanning and 3D reconstruc-tion techniques. This work aimed at providing a detail description on the micro-structure and fracture-connectivity characteristics of rupture coal samples under different mining layouts. The results show that: (i) for protected coal seam mining layout, the coal specimens failure is in a compression-shear manner and oppositely, (ii) the tension-shear failure phenomenon is observed for top-coal caving and non-pillar mining layouts. By investigating the connectivity features of the generated fractures in the direction of r1 under different mining layouts, it is found that the connectivity level of the fractures of the samples corresponding to non-pillar mining layout was the highest. 展开更多
关键词 Coal Coal deposits Computerized tomography Rock mechanics Room and pillar mining Three dimensional
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Positron emission tomography/computerized tomography in the evaluation of primary non-Hodgkin's lymphoma of prostate 认领 引用 被引量：7
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作者 Bo Pan Jian-Kui Han +1 位作者 Shi-Cun Wang Ao Xu 《World Journal of Gastroenterology》 SCIE CAS 2013年第39期6699-6702,共4页
Primary malignant lymphoma of the prostate is exceedingly rare.Here we report a case of a 65-year-old man who presented with increased urinary frequency,urinary urgency,and urinary incontinence for two years.Benign pr... Primary malignant lymphoma of the prostate is exceedingly rare.Here we report a case of a 65-year-old man who presented with increased urinary frequency,urinary urgency,and urinary incontinence for two years.Benign prostatic hypertrophy was suspected at primary impression.Ultrasound revealed a hypoechoic lesion of the prostate.The total serum prostate-specific antigen was within normal range.Positron emission tomography/computerized tomography(PET/CT)showed a hypermetabolic prostatic lesion.Prostate biopsy was consistent with a non-germinal center diffuse large B cell lymphoma.There was complete remission of the prostatic lesion following six cycles of chemotherapy as shown on the second PET/CT imaging.18F-fluoro-deoxy glucose PET/CT is not only a complement to conventional imaging,but also plays a significant role in the diagnosis and evaluation of treatment response of prostatic lymphoma. 展开更多
关键词 Fluoro-Deoxy-Glucose Positron emission tomography/computerized tomography Non-Hodgkin’s lymphoma Prostatic lymphoma Evaluation
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Effects of Carbon Nanotubes on Mechanical and 2D-3D Microstructure Properties of Cement Mortar 认领 引用 被引量：7
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作者 刘巧玲 SUN Wei +1 位作者 JIANG Hao WANG Caihui 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2014年第3期513-517,共5页
To study the influence of multi-wall carbon nanotubes （MWCNTs） on the mechanical and microstructural properties of cementitious composites, 0.00, 0.02, 0.08, 0.10, and 0.20 wt% of multi-wall carbon nanotubes were ad... To study the influence of multi-wall carbon nanotubes （MWCNTs） on the mechanical and microstructural properties of cementitious composites, 0.00, 0.02, 0.08, 0.10, and 0.20 wt% of multi-wall carbon nanotubes were added into cement mortar, in which the cement-sand ratio was 1：1.5. The flexural and compressive strengths of cement mortar at the age of 3, 7, 28 and 90 d and the fracture performance at the age of 28 d were determined, its 2D micrograph was tested by means of SEM, and the 3D defects distribution was firstly determined with or without CNTs by means of XCT （X-ray computerized tomography）. The results showed that 0.08 wt% of CNTs improved the compressive strength and flexural strength by 18% and 19~A, respectively, and a significant improvement of its fracture property was observed. Moreover lower addition of carbon nanotubes to cement mortars can improve its microstructure and decrease the defects significantly compared to the cement mortar without CNTs. With the increase of the content of CNTs, the mechanical properties of cement mortars presented to be declined largely due to the agglomeration of CNTs. 展开更多
关键词 carbon nanotubes cement mortar mechanical properties agglomeration microstmcture XCT （X-ray computerized tomography）
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Current trends in staging rectal cancer 认领 引用 被引量：34
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作者 Abdus Samee Chelliah Ramachandran Selvasekar 《World Journal of Gastroenterology》 SCIE CAS CSCD 2011年第7期828-834,共7页
Management of rectal cancer has evolved over the years. In this condition preoperative investigations assist in deciding the optimal treatment. The relation of the tumor edge to the circumferential margin (CRM) is an ... Management of rectal cancer has evolved over the years. In this condition preoperative investigations assist in deciding the optimal treatment. The relation of the tumor edge to the circumferential margin (CRM) is an important factor in deciding the need for neoadjuvant treatment and determines the prognosis. Those with threatened or involved margins are offered long course chemoradiation to enable R0 surgical resection. Endoanal ultrasound (EUS) is useful for tumor (T) staging; hence EUS is a useful imaging modality for early rectal cancer. Magnetic resonance imaging (MRI) is useful for assessing the mesorectum and the mesorectal fascia which has useful prognostic significance and for early identification of local recurrence. Computerized tomography (CT) of the chest, abdomen and pelvis is used to rule out distant metastasis. Identification of the malignant nodes using EUS, CT and MRI is based on the size, morphology and internal characteristics but has drawbacks. Most of the common imaging techniques are suboptimal for imaging following chemoradiation as they struggle to differentiate fibrotic changes and tumor. In this situation, EUS and MRI may provide complementary information to decide further treatment. Functional imaging using positron emission tomography (PET) is useful, particularly PET/CT fusion scans to identify areas of the functionally hot spots. In the current state, imaging has enabled the multidisciplinary team of surgeons, oncologists, radiologists and pathologists to decide on the patient centered management of rectal cancer. In future, functional imaging may play an active role in identifying patients with lymph node metastasis and those with residual and recurrent disease following neoadjuvant chemoradiotherapy. 展开更多
关键词 Rectal cancer Staging Investigations Magnetic resonance imaging Ultrasound Endoanal ultrasound Positron emission tomography Computerized tomography
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Peripancreatic collections in acute pancreatitis: Correlation between computerized tomography and operative fi ndings 认领 引用 被引量：6
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作者 Santhi Swaroop Vege Joel G Fletcher +1 位作者 Rupjyoti Talukdar Michael G Sarr 《World Journal of Gastroenterology》 SCIE CAS 2010年第34期4291-4296,共6页
AIM: To evaluate the ability of contrast-enhanced computerized tomography (CECT) to characterize the nature of peripancreatic collections.METHODS: Twenty five patients with peripancreatic collections on CECT and who u... AIM: To evaluate the ability of contrast-enhanced computerized tomography (CECT) to characterize the nature of peripancreatic collections.METHODS: Twenty five patients with peripancreatic collections on CECT and who underwent operative intervention for severe acute pancreatitis were retrospectively studied. The collections were classified into (1) necrosis without frank pus; (2) necrosis with pus; and (3) fluid without necrosis. A blinded radiologist assessed the preoperative CTs of each patient for necrosis and peripancreatic fluid collections. Peripancreatic collections were described in terms of volume, location, number, heterogeneity, fluid attenuation, wall perceptibility, wall enhancement, presence of extraluminal gas, and vascular compromise.RESULTS: Fifty-four collections were identif ied at operation, of which 45 (83%) were identif ied on CECT. Of these, 25/26 (96%) had necrosis without pus, 16/19 (84%) had necrosis with pus, and 4/9 (44%) had fluid without necrosis. Among the study characteristics, fluid heterogeneity was seen in a greater proportion of collections in the group with necrosis and pus, compared to the other two groups (94% vs 48% and 25%, P = 0.002 and 0.003, respectively). Among the wall characteristics, irregularity was seen in a greater proportion of collections in the groups with necrosis with and without pus, when compared to the group with fluid without necrosis (88% and 71% vs 25%, P = 0.06 and P < 0.01, respectively). The combination of heterogeneity and presence of extraluminal gas had a specif icity and positive likelihood ratio of 92% and 5.9, respectively, in detecting pus. CONCLUSION: Most of the peripancreatic collections seen on CECT in patients with severe acute pancreatitis who require operative intervention contain necrotic tissue. CECT has a somewhat limited role in differentiating the different types of collections. 展开更多
关键词 Contrastenhanced computerized tomogra-phy Correlation Pancreatic necrosis Pancreatitis Peripancreatic fluid collection Surgery
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A quantitative assessment of the distribution and extent of urban clusters in China 认领 引用 被引量：4
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作者 ZHANG Qian HU Yunfeng +3 位作者 LIU Jiyuan LIU Yue REN Wangbing LI Jun 《Journal of Geographical Sciences》 SCIE CSCD 2012年第1期137-151,共15页
Urban clusters are the expected products of high levels of industry and urbanization in a country, as well as being the basic units of participation in global competition. With respect to China, urban clusters are reg... Urban clusters are the expected products of high levels of industry and urbanization in a country, as well as being the basic units of participation in global competition. With respect to China, urban clusters are regarded as the dominant formation for boosting the Chinese urbanization process. However, to date, there is no coincident, efficient, and credible methodological system and set of techniques to identify Chinese urban clusters. This research investigates the potential of a computerized identification method supported by geographic information techniques to provide a better understanding of the distribution of Chinese urban clusters. The identification method is executed based on a geographic information database, a digital elevation model, and socio-economic data with the aid of ArcInfo Macro Language programming. In the method, preliminary boundaries are identified accord-ing to transportation accessibility, and final identifications are achieved from limiting city numbers, population, and GDP in a region with the aid of the rasterized socio-economic dataset. The results show that the method identifies nine Chinese urban clusters, i.e., Pearl River Delta, Lower Yangtze River Valley, Beijing-Tianjin-Hebei Region, Northeast China Plain, Middle Yangtze River Valley, Central China Plains, Western Taiwan Strait, Guanzhong and Chengdu-Chongqing urban clusters. This research represents the first study involving the computerized identification of Chinese urban clusters. Moreover, compared to other related studies, the study’s approach, which combines transportation accessibility and socio-economic characteristics, is shown to be a distinct, effective and reliable way of identifying urban clusters. 展开更多
关键词 urban clusters Geographic Information System （GIS） computerized identification spatial distribu-tion China
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